Radiating element and multi-frequency antenna

Abstract

The application relates to a radiation unit and a multi-frequency antenna. The mutual coupling amount of two conductor segments in operation is reduced with the increase of the interval a. Since a >= 1 / 20 lambda2, that is, the interval a is large, the mutual coupling amount of the two conductor segments in operation is small, that is, the two conductor segments are in a weak mutual coupling state in the application. When the current directions of the two conductor segments are opposite, the radiation fields of the space radiation generated by the two conductor segments are mutually offset. Therefore, the scattering suppression structure formed by the two conductor segments with opposite current directions and the low-pass high-resistance segment has a scattering self-offset function and has a good scattering suppression effect. In addition, since the interval a is large, not only can the radiation arm be manufactured by using a circuit board process, but also the radiation arm can be manufactured by using a sheet metal process, so that the processing is more convenient. In addition, a+2b cannot be too large. When a+2b > 1 / 2 lambda1, resonance modes will be caused in the preset working frequency band. In other words, when a+2b <= 1 / 2 lambda1, the scattering interference on the preset working frequency band can be ensured to be low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile communication, in particular to a radiation unit and a multi-frequency antenna. BACKGROUND

[0002] With the development of mobile communication system, the antenna, as the receiving / transmitting component of signal in the mobile communication system, has been developed rapidly. In order to realize the overall miniaturization of the antenna and support multi-band application, multi-band common aperture antenna is applied more and more widely. The multi-band common aperture antenna at least includes radiation units of low frequency band and high frequency band, and even has the demand of radiation units of low frequency band, medium frequency band and high frequency band together in array. The induced current on the surface of the low frequency band radiation unit is scattered when the low frequency band radiation unit is in common array with other frequency band radiation units, which will cause scattering interference and reduce the performance of other frequency band radiation units.

[0003] In the related art, in order to suppress the scattering interference, a scattering suppression structure is usually arranged on the radiation arm of the low frequency band radiation unit. The scattering suppression structure forms inductance to block high frequency signals when the high frequency signals are induced, so as to realize the scattering suppression. However, in order to have better scattering suppression effect, the number of the scattering suppression structure is large, which leads to the complex structure of the radiation arm of the low frequency band radiation unit, and is not convenient for processing. Moreover, the increase of the scattering suppression structure will have adverse effects on the performance of the low frequency band radiation unit itself. SUMMARY

[0004] Therefore, it is necessary to overcome the defects of the prior art, and to provide a radiation unit and a multi-frequency antenna, which can have better scattering suppression effect, are convenient for processing, and have little effect on the performance of the low frequency band radiation unit itself.

[0005] A radiation unit, comprising a radiation arm, the radiation arm comprising: a feeding part and a radiation ring, the radiation ring being connected with the feeding part, the radiation ring comprising a scattering suppression structure, the scattering suppression structure being used for suppressing signals of a preset working frequency band, the scattering suppression structure comprising two conductor segments and a connecting segment connected between the conductor segments, the current directions of the two conductor segments being opposite, and the connecting segment being a low-pass high-resistance segment; the distance between the two conductor segments is a, the length of the conductor segment is b, the highest frequency point wavelength of the preset working frequency band is λ1, and the lowest frequency point wavelength of the working frequency band of the radiation arm is λ2, wherein a+2b≤1 / 2λ1 and a≥1 / 20λ2.

[0006] In one of the embodiments, the scattering suppression structure is multiple, and the multiple scattering suppression structures are connected in series.

[0007] In one of the embodiments, the radiation ring further comprises a plurality of interconnecting segments, each of the interconnecting segments being connected in series between any two adjacent scattering suppression structures.

[0008] In one of the embodiments, the length of the interconnecting segment is C, 0 < C ≤ 1 / 2 λ1.

[0009] In one of the embodiments, the line width of the connecting segment is set to ≤ 1 / 50 λ1, and / or, the line width of the interconnecting segment is set to ≤ 1 / 50 λ1, and / or, the line width of the radiation ring at each position along the ring direction is the same.

[0010] In one of the embodiments, the number of the scattering suppression structures is 2 to 6.

[0011] In one of the embodiments, the plurality of scattering suppression structures comprises a first scattering suppression structure and a second scattering suppression structure, and the first scattering suppression structure and the second scattering suppression structure are arranged at an angle.

[0012] In one of the embodiments, the radiation arm is arranged in an axisymmetric structure; one first scattering suppression structure and one second scattering suppression structure form a scattering suppression group, and at least one scattering suppression group is arranged on either side of the symmetry axis Z of the radiation arm.

[0013] In one of the embodiments, each of the scattering suppression structures is formed with an opening; the opening of the scattering suppression structure close to the feeding portion faces the outside of the radiation ring; and / or, the opening of the scattering suppression structure away from the feeding portion faces the inside of the radiation ring.

[0014] In one of the embodiments, the connecting segment comprises one or more combinations of a straight line segment, an arc line segment, an S-shaped line segment and a broken line segment.

[0015] In one of the embodiments, the radiation arm is arranged in four and arranged in orthogonal polarization.

[0016] In one of the embodiments, the radiation arm further comprises a substrate, and the feeding portion and the radiation ring are circuit layers arranged on the substrate; or, the radiation arm is arranged as a sheet metal part.

[0017] A multi-frequency antenna, comprising a first radiating unit, a second radiating unit and a reflecting plate, the first radiating unit and the second radiating unit are arranged on the reflecting plate, the working frequency range of the first radiating unit is lower than that of the second radiating unit, the first radiating unit adopts the radiating unit, the projection of the first radiating unit on the reflecting plate is a first projection, the projection of the second radiating unit on the reflecting plate is a second projection, and the first projection and the second projection at least partially overlap.

[0018] In one embodiment, the four radiating arms of each first radiating unit correspond to four second radiating units in position respectively, and the projection of the radiating arm of the first radiating unit on the reflecting plate at least partially overlaps the projection of the corresponding second radiating unit on the reflecting plate.

[0019] The radiating unit and the multi-frequency antenna described above, the mutual coupling amount of the two conductor segments during work decreases with the increase of the interval a, and since a≥1 / 20λ2, the mutual coupling amount of the two conductor segments during work is small, that is, the two conductor segments are in a weak mutual coupling state, and when the current directions of the two conductor segments are opposite, the radiation fields of the spatial radiation generated by the two conductor segments are mutually offset. Therefore, the scattering suppression structure formed by the two conductor segments with opposite current directions and the low-pass high-resistance segment has a scattering self-offsetting function and has a good scattering suppression effect. In addition, since the interval a is large, not only can the circuit board process be used to manufacture the radiating arm, but also the sheet metal process can be used to manufacture the radiating arm, so that the processing is more convenient. In addition, a+2b cannot be too large, and when a+2b>1 / 2λ1, resonance mode will be caused in the preset working frequency range. In other words, when a+2b≤1 / 2λ1, it can be used to ensure that the scattering interference on the preset working frequency range is low. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structure diagram of a radiating arm of an embodiment of the related art.

[0021] Figure 2 A structure diagram of a radiating arm of a first embodiment of the present application.

[0022] Figure 3 A structure diagram of a radiating arm of a second embodiment of the present application.

[0023] Figure 4 A structure diagram of a scattering suppression structure in a radiating arm of an embodiment of the present application.

[0024] Figure 5 A structure diagram of a scattering suppression structure in a radiating arm of another embodiment of the present application.

[0025] Figure 6 Structure diagram of the connecting section in the radiating arm for an embodiment of the present application.

[0026] Figure 7 Structure diagram of the connecting section in the radiating arm for another embodiment of the present application.

[0027] Figure 8 Structure diagram of the radiating unit for an embodiment of the present application.

[0028] Figure 9 Structure diagram of the radiating unit for another embodiment of the present application.

[0029] Figure 10 Structure diagram of the multi-frequency antenna for an embodiment of the present application.

[0030] Figure 11 Comparison diagram of the monostatic radar cross section (RCS) response curves of three different radiating arms under the planar wave excitation adjustment. Figure 1 , Figure 2 and Figure 3 Comparison diagram of the monostatic radar cross section (RCS) response curves of three different radiating arms under the planar wave excitation adjustment.

[0031] 110, conductive section; 120, inductive element; 121, transmission line;

[0032] 20, radiating unit; 21, radiating arm; 211, feeding part; 212, radiating ring; 213, scattering suppression structure; 2131, conductive section; 2132, connecting section; 2133, opening; 2134, scattering suppression sub-group; 2135, first scattering suppression structure; 2136, second scattering suppression structure; 214, interconnecting section; 215, substrate; 201, first radiating unit; 202, second radiating unit; 203, reflecting plate. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0034] As described in the background, the number of scattering suppression structures in the prior art is large, which leads to the problem of complex structure of the radiating arm of the low-frequency radiating unit and inconvenience in processing. The inventors have found that the reason for this problem is that, please refer to Figure 1 , Figure 1An embodiment of the related art is shown in a structure diagram of a radiating arm, which includes a plurality of conductive sections 110 and a plurality of inductive elements 120 connected in series to form a closed loop structure. The conductive sections 110 are used to support low-frequency current flow, and the inductive elements 120 are configured to have relatively low impedance at low-band frequencies and relatively high impedance at high-band frequencies, i.e., the inductive elements 120 play a role in scattering suppression. The inductive elements 120 are, for example, provided in a U-shaped structure as shown in the figure, in which the distance S between the two transmission lines 121 is small, and an inductance is formed when a high-frequency signal is induced, thereby playing a high-frequency role. However, a small distance S will result in difficulty in processing the radiating arm, especially in that the radiating arm cannot be processed by sheet metal processing. In addition, the line width W of the conductive sections 110 is designed to be large, and when the signal of the second radiating unit is radiated to the conductive sections 110, resonance will occur, thereby canceling the scattering suppression effect at the inductive elements 120, so that the overall scattering suppression effect is weakened. Figure 1

[0035] Based on the above reasons, the present application provides a radiating unit and a multi-frequency antenna, which can have a good scattering suppression effect, is convenient to process, and has a small impact on the performance of the low-frequency radiating unit.

[0036] Referring to Figure 2 , Figure 4 and Figure 5 , Figure 2 a structure diagram of a radiating arm 21 of a first embodiment of the present application is shown, Figure 4 and Figure 5 structure diagrams of two different shapes of scattering suppression structures 213 in the radiating arm 21 of an embodiment are shown. A radiating unit 20 provided by an embodiment of the present application includes a radiating arm 21. The radiating arm 21 includes a feeding portion 211 and a radiating ring 212. The radiating ring 212 is connected to the feeding portion 211, and the radiating ring 212 includes a scattering suppression structure 213 for suppressing signals of a preset operating frequency band. The scattering suppression structure 213 includes two conductor sections 2131 and a connecting section 2132 connected between the conductor sections 2131. The current directions of the two conductor sections 2131 are opposite, and the connecting section 2132 is a low-pass high-resistance section. The distance between the two conductor sections 2131 is a, the length of the conductor section 2131 is b, the highest frequency point wavelength of the preset operating frequency band is λ1, and the lowest frequency point wavelength of the operating frequency band of the radiating arm 21 is λ2, wherein a+2b≤1 / 2λ1 and a≥1 / 20λ2.

[0037] In some embodiments, the operating frequency band of the radiating arm 21 includes, but is not limited to, 698MHz-960MHz, and accordingly, a≥15mm, and a is specifically, for example, 15mm, 16mm, 18mm, 20mm, or 25mm, etc., which can be flexibly adjusted and set according to actual needs.​

[0038] In some embodiments, the preset working frequency band is higher than the working frequency band of the radiation arm 21. Optionally, the preset working frequency band includes, but is not limited to, 1427 MHz-2690 MHz or 3300 MHz-4200 MHz, etc., which can be flexibly adjusted and set according to actual needs, and is not limited herein. As a specific embodiment, the working frequency band of the radiation arm 21 is set as a low frequency band, and the preset working frequency band is correspondingly set as a high frequency band.

[0039] The mutual coupling amount of the two conductor segments 2131 in the working state decreases with the increase of the interval a. Since a≥1 / 20λ2, that is, the interval a is large, the mutual coupling amount of the two conductor segments 2131 in the working state is small, that is, the two conductor segments 2131 are in a weak mutual coupling state. When the current directions of the two conductor segments 2131 are opposite, the radiation fields of the space radiation generated by the two conductor segments 2131 are mutually offset. Therefore, the scattering suppression structure formed by the two conductor segments 2131 with opposite current directions and the low-pass high-resistance segment has a scattering self-offset function and has a good scattering suppression effect. In addition, since the interval a is large, the radiation arm 21 can be made by using a circuit board process, and the radiation arm 21 can also be made by using a sheet metal process, so that the processing is more convenient. In addition, a+2b cannot be too large. When a+2b>1 / 2λ1, a resonance mode will be caused in the preset working frequency band. In other words, when a+2b≤1 / 2λ1, the scattering interference on the preset working frequency band can be ensured to be low.

[0040] It should be noted that the connection of the radiation ring 212 and the feeding portion 211 can form a closed loop structure or a non-closed loop structure. In this embodiment, the combination of the radiation ring 212 and the feeding portion 211 is taken as an example to form a closed loop structure, that is, the radiation arm 21 is in a closed loop structure. Specifically, the radiation arm 21 is in a closed loop shape and is hollow inside. When the radiation unit 20 containing the radiation arm 21 is arranged in an array with the second radiation unit 202, on the one hand, the scattering suppression structure 213 of the radiation arm 21 can suppress the high frequency bandwidth; on the other hand, the hollow radiation arm 21 can facilitate the transmission of the high frequency signal emitted by the second radiation unit 202. Therefore, the radiation arm 21 less participates in the mutual coupling and scattering of the second radiation unit 202, and the radiation performance of the high frequency antenna in the array is improved.

[0041] In some embodiments, the number of the scattering suppression structures 213 is not limited to one, but is set to multiple, for example, 2, 3, 4, 5, 6 or 8, etc., which can be set according to actual needs, and is not limited herein. When the number of the scattering suppression structures 213 increases, the scattering suppression effect on the preset working frequency band can be increased. In this embodiment, the scattering suppression structures 213 are multiple, and the multiple scattering suppression structures 213 are connected in series.

[0042] Optionally, the scattering suppression structures 213 are arranged on the radiation ring 212 in 4 or 6, and are arranged in turn and at intervals. In this way, the number of the scattering suppression structures 213 is more, so that the radiation arm 21 has a better scattering suppression effect on the preset working frequency band when working. In addition, when the number of the scattering suppression structures 213 is too much, for example, more than 6, it will cause adverse effects on the working frequency band of the radiation arm 21. Therefore, the number of the scattering suppression structures 213 is set to be less than or equal to 6, so that the number of the scattering suppression structures 213 is moderate, and the influence on the working frequency band of the radiation arm 21 is small. In addition, when the number of the scattering suppression structures 213 is less than or equal to 6, the number is less, so that the radiation arm 21 is more convenient to process and manufacture.

[0043] In some embodiments, each scattering suppression structure 213 is formed with an opening 2133. Specifically, the two conductor segments 2131 and the connecting segment 2132 enclose the opening 2133. Optionally, as shown in FIG. 2B, the two conductor segments 2131 are, for example, perpendicular to the connecting segment 2132, so that the current directions of the two conductor segments 2131 are opposite, thereby causing the radiation fields of the external space radiation to be mutually cancelled; or as shown in FIG. 2C, the two conductor segments 2131 and the connecting segment 2132 combine to form a structure, for example, in the shape of U, that is, the connection positions of the two conductor segments 2131 and the connecting segment 2132 are allowed to be arranged with rounded corners, and the current directions of the two conductor segments 2131 are still opposite. Figure 4 Figure 5

[0044] In some embodiments, the connecting segment 2132 includes one or more combinations of a straight line segment, an arc line segment, an S-shaped line segment, and a broken line segment.

[0045] ​​In some embodiments, the plurality of scattering suppression structures 213 includes a first scattering suppression structure 2135 and a second scattering suppression structure 2136. The extension direction of the conductor segments 2131 of the first scattering suppression structure 2135 is arranged at an angle with the extension direction of the conductor segments 2131 of the second scattering suppression structure 2136. In other words, the directions of the openings 2133 of at least one pair of scattering suppression structures 213 are arranged at an angle. In this way, one first scattering suppression structure 2135 and one second scattering suppression structure 2136 form a scattering suppression group 2134. In this way, the two scattering suppression structures 213 of the scattering suppression group 2134 are arranged in two different directions, which have a suppression effect on the preset working frequency band in two different directions, so that the radiation unit 20 of each preset working frequency band arranged in different positions, at different angles and at different distances from the radiation arm 21 has a better scattering suppression effect. In addition, it has a better suppression effect on the induced current from the dual-polarized illumination field. Specifically, the two scattering suppression structures 213 of the scattering suppression group 2134 are arranged adjacent to each other along the annular direction of the radiation ring 212.

[0046] In some embodiments, the angle between the extension direction of the conductor segments 2131 of the first scattering suppression structure 2135 and the extension direction of the conductor segments 2131 of the second scattering suppression structure 2136 includes but is not limited to 60°, 70°, 80°, 90°, 100°, 110° or 120°, etc.

[0047] Specifically, the extension direction of the conductor segments 2131 of the first scattering suppression structure 2135 and the extension direction of the conductor segments 2131 of the second scattering suppression structure 2136 are perpendicular or substantially perpendicular to each other. Wherein, "substantially" perpendicular means that the extension direction of the conductor segments 2131 of the first scattering suppression structure 2135 and the extension direction of the conductor segments 2131 of the second scattering suppression structure 2136 are not strictly 90°, but are allowed to deviate within a range of ±10° based on being perpendicular to each other.

[0048] In some embodiments, referring to Figure 2 , there are two scattering suppression groups 2134 in the radiation ring 212. Optionally, the two scattering suppression groups 2134 are arranged on opposite sides of the symmetry axis Z of the radiation arm 21, and are symmetrically arranged about the symmetry axis Z of the radiation arm 21, for example. In this way, the signals of the preset working frequency band have a better scattering suppression effect. Wherein, the symmetry axis Z of the radiation arm 21 is the polarization axis direction of the radiation arm 21.

[0049] In some embodiments, referring to Figure 3 , there are three scattering suppression groups 2134 in the radiation ring 212. Figure 3 The structure shown in Figure 2As shown in the structure, one more scattering suppression group 2134 can be added, and two scattering suppression structures 213 in the one more scattering suppression group 2134 are respectively arranged on opposite sides of the symmetry axis Z of the radiation arm 21 and are symmetrically arranged, for example, with respect to the symmetry axis Z of the radiation arm 21. In this way, by increasing the number of scattering suppression structures 213, the length of the interconnection section 214 can be reduced, so as to prevent the length of the interconnection section 214 from being too long to cause resonance and offset the scattering suppression effect.

[0050] Referring to Figure 2 or Figure 3 In some embodiments, the openings 2133 of the scattering suppression structures 213 close to the feed part 211 are directed to the outside of the radiation ring 212; and / or the openings 2133 of the scattering suppression structures 213 away from the feed part 211 are directed to the inside of the radiation ring 212. In this way, the radiation arm 21 can occupy a larger space, so as to have better gain and directivity indicators.

[0051] Referring to Figure 2 or Figure 3 In a specific embodiment, the radiation arm 21 is arranged in an axisymmetric structure, and at least one pair of scattering suppression structures 213 is arranged on any side of the symmetry axis Z of the radiation arm 21. In addition, a first scattering suppression structure 2135 and a second scattering suppression structure 2136 form a scattering suppression group 2134.

[0052] Referring to Figure 2 or Figure 3 In some embodiments, the radiation ring 212 further includes a plurality of interconnection sections 214. Each interconnection section 214 is connected in series between any two adjacent scattering suppression structures 213. The interconnection section 214 serves to electrically connect any two adjacent scattering suppression structures 213, so that all the scattering suppression structures 213 are connected in series to form, for example, a closed loop structure.

[0053] In an embodiment, the length of each interconnection section 214 is flexibly adjusted and set according to actual needs, which can be the same or different, and is not limited here. The length of the interconnection section 214 is C, and 0 < C ≤ 1 / 2 λ1. In this way, when the length C of the interconnection section 214 is greater than 1 / 2 λ1, resonance will occur, and the amount of resonance will increase with the increase of the length C, thereby offsetting the scattering suppression effect of the scattering suppression structure 213. That is, when C ≤ 1 / 2 λ1, the resonance caused by the interconnection section 214 can be minimized, thereby improving the scattering suppression effect.

[0054] In some embodiments, referring to Figure 2The connecting section 2132 is specifically configured as a straight line, and a line width of the straight line is configured as, for example, ≤1 / 50λ1, specifically, 1 / 50λ1, 1 / 75λ1, or 1 / 100λ1, etc. In this way, since the line width is small, the shielding of the radiation unit 20 below the preset working frequency band is small, and thus the antenna performance can be improved. In addition, the inductance at the connecting section 2132 increases with the decrease of the line width, and plays a role in suppressing the induced current of the preset working frequency band.

[0055] Of course, as some optional solutions, please refer to Figure 6 or Figure 7 The connecting section 2132 can also be configured as, for example, an inductor, or a combination of inductor and capacitor, as long as it can play a low-pass high-resistance role.

[0056] In addition, similar to the line width setting mode of the connecting section 2132, optionally, the line width of the interconnection section 214 includes but is not limited to ≤1 / 50λ1, specifically, ≤1 / 75λ1, or even less than 1 / 100λ1, so as to reduce the resonance of the signal of the preset working frequency band, and at the same time, reduce the shielding of the radiation unit 20 below the preset working frequency band, so as to improve the antenna performance.

[0057] In a specific embodiment, the line width of the radiation ring 212 at each position along the ring direction is the same. Specifically, the line width of the radiation ring 212 is configured as ≤1 / 50λ1, specifically, ≤1 / 75λ1, or even less than 1 / 100λ1, so as to reduce the resonance of the signal of the preset working frequency band, and at the same time, reduce the shielding of the radiation unit 20 below the preset working frequency band, so as to improve the antenna performance.

[0058] In some embodiments, the radiation arm 21 further includes a substrate 215, as shown in Figure 9 The feeding section 211 and the radiation ring 212 are, for example, a circuit layer arranged on the substrate 215. In a specific arrangement, the substrate 215 and the circuit layer can be made by adopting a printed circuit, that is, the circuit layer is printed on the substrate 215 to form a printed circuit board, or the substrate 215 can also be made of a plastic or ceramic material, and the circuit layer is formed on the substrate 215 by other circuit manufacturing methods.

[0059] Optionally, the radiation arm 21 can also be made without the substrate 215, and is made by, for example, sheet metal process, as shown in Figure 8 .

[0060] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 11 , Figure 11 illustratesFigure 1 , Figure 2 and Figure 3 The single station radar scattering cross section (RCS) response curve comparison chart of three different radiation arms 21 with the structure shown in FIG. 13 under the planar wave excitation adjustment. It can be seen from Figure 11 that compared with the related art, when four scattering suppression structures 213 are added and the directions of the openings 2133 of the two pairs of scattering suppression structures 213 are perpendicular to each other, better scattering suppression effect can be achieved for signals of 1427MHz~2690MHz and 3300MHz~4200MHz; compared with the related art, when six scattering suppression structures 213 are added and the directions of the openings 2133 of the three pairs of scattering suppression structures 213 are perpendicular to each other, better scattering suppression effect can be achieved for signals of 1427MHz~2690MHz and 3300MHz~4200MHz; compared with the first embodiment and the second embodiment, the second embodiment has better scattering suppression effect for signals of 1427MHz~2690MHz and 3300MHz~4200MHz.

[0061] In one embodiment, the radiation arm 21 is provided as four and arranged in orthogonal polarization.

[0062] In some embodiments, the radiation unit 20 further comprises a balun, and the balun is electrically connected with the feeding portion 211.

[0063] Please refer to Figure 10 In one embodiment, the present application also provides a multi-frequency antenna, which comprises a first radiation unit 201, a second radiation unit 202 and a reflector 203. The first radiation unit 201 and the second radiation unit 202 are arranged on the reflector 203, the working frequency band of the first radiation unit 201 is lower than that of the second radiation unit 202, the first radiation unit 201 adopts the radiation unit 20 of any one of the above embodiments, the projection of the first radiation unit 201 on the reflector 203 is set as a first projection, the projection of the second radiation unit 202 on the reflector 203 is set as a second projection, and the first projection and the second projection at least partially overlap.

[0064] The mutual coupling amount of the two conductor segments 2131 in operation decreases with the increase of the interval a. Since a≥1 / 20λ2, the mutual coupling amount of the two conductor segments 2131 in operation is small, i.e., the two conductor segments 2131 are in a weak mutual coupling state. When the current directions of the two conductor segments 2131 are opposite, the radiation fields of the spatial radiation generated by the two conductor segments 2131 are mutually offset. Therefore, the scattering suppression structure formed by the two conductor segments 2131 with opposite current directions and the low-pass high-resistance segment has a scattering self-offset function and has a good scattering suppression effect. In addition, since the interval a is large, the radiation arm 21 can be manufactured by using a circuit board process or a sheet metal process, thereby facilitating processing.

[0065] Please refer to Figure 10 In one specific embodiment, the four radiation arms 21 of each first radiation unit 201 correspond to the four second radiation units 202 in position respectively. The projection of the radiation arm 21 of the first radiation unit 201 on the reflection plate 203 at least partially overlaps the projection of the corresponding second radiation unit 202 on the reflection plate 203. In this way, a compact layout can be achieved, and the overall aperture size of the product is small.

[0066] In the description of the present application, it should be understood that if these terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In addition, if these terms “first”, “second” appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In the description of the present application, if the term “multiple” appears, the meaning of “multiple” is at least two, such as two, three, etc., unless otherwise specifically limited.

[0068] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0069] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0070] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation.

[0071] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0072] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A radiating unit, characterized in that, The radiating unit includes a radiating arm, which comprises a feed section and a radiating ring. The radiating ring is connected to the feed section. The radiating ring includes a scattering suppression structure for suppressing signals in a preset operating frequency band. The scattering suppression structure includes two conductor segments and a connecting segment between the conductor segments. The current directions of the two conductor segments are opposite. The connecting segment is a low-pass, high-impedance segment. The distance between the two conductor segments is 'a', the length of the conductor segments is 'b', the highest frequency wavelength of the preset operating frequency band is λ1, and the lowest frequency wavelength of the operating frequency band of the radiating arm is λ2, where a+2b≤1 / 2λ1, a≥1 / 20λ2.

2. The radiating unit according to claim 1, characterized in that, The scattering suppression structure is multiple, and the multiple scattering suppression structures are connected in series.

3. The radiating unit according to claim 2, characterized in that, The radiation ring also includes multiple interconnect segments, each of which is connected in series between any two adjacent scattering suppression structures.

4. The radiating unit according to claim 3, characterized in that, The length of the interconnect segment is C,0 <C≤1 / 2λ1。 5. The radiating element according to claim 3, characterized in that, The linewidth of the connecting segment is set to ≤1 / 50λ1, and / or the linewidth of the interconnecting segment is set to ≤1 / 50λ1, and / or the linewidth of the radiation ring is the same at all locations along its circumferential direction.

6. The radiating unit according to claim 2, characterized in that, The number of scattering suppression structures is 2 to 6.

7. The radiating unit according to claim 2, characterized in that, The plurality of scattering suppression structures include a first scattering suppression structure and a second scattering suppression structure, wherein the first scattering suppression structure and the second scattering suppression structure are arranged at an angle.

8. The radiating element according to claim 7, characterized in that, The radiation arm is configured in an axisymmetric structure; a first scattering suppression structure and a second scattering suppression structure form a scattering suppression group, and at least one of the scattering suppression groups is provided on either side of the axis of symmetry Z of the radiation arm.

9. The radiating unit according to claim 2, characterized in that, Each of the scattering suppression structures has an opening; the opening of the scattering suppression structure near the feed portion faces the outside of the radiation ring; and / or, the opening of the scattering suppression structure away from the feed portion faces the inside of the radiation ring.

10. The radiating element according to claim 1, characterized in that, The connecting segment includes one or more combinations of straight line segments, arc segments, S-shaped line segments, and broken line segments.

11. The radiating element according to claim 1, characterized in that, The radiating arms are configured as four and arranged in an orthogonal polarization.

12. The radiating element according to any one of claims 1 to 11, characterized in that, The radiating arm further includes a substrate, and the power supply section and the radiating ring are circuit layers disposed on the substrate; or, the radiating arm is configured as a sheet metal part.

13. A multi-frequency antenna, characterized in that, The multi-frequency antenna includes a first radiating element, a second radiating element, and a reflector. The first radiating element and the second radiating element are disposed on the reflector. The operating frequency band of the first radiating element is lower than that of the second radiating element. The first radiating element is a radiating element as described in any one of claims 1 to 12. The projection of the first radiating element on the reflector is designated as a first projection, and the projection of the second radiating element on the reflector is designated as a second projection. The first projection and the second projection at least partially overlap.

14. The multi-frequency antenna according to claim 13, characterized in that, The four radiating arms of each of the first radiating units correspond to the positions of the four second radiating units, and the projection of the radiating arm of the first radiating unit on the reflector plate at least partially overlaps with the projection of the corresponding second radiating unit on the reflector plate.

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